Task Lead bromide is an ionic substance that can be electrolysed to form lead and bromine. The equation for this is:

PbBr2(l) → Pb(l) + Br2(g)

Design a poster that explains what happens when lead bromide, PbBr2, is electrolysed.

You should include diagrams to show what is happening to the ions that make up lead bromide, Pb2+ and Br–, before, during, and after electrolysis.

It is up to you how you set out your poster, but you must make sure that your poster provides answers to the following questions:

1 Why are ionic substances able to be electrolysed?

2 What are electrodes and what is an electrolyte?

3 Which electrode will the lead ions move to? Why?

4 Which electrode will the bromide ions move to? Why?

5 What happens at the electrodes? (Make sure you use the words reduction and oxidation in your answer to this question.)

6 What is formed at each electrode?

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kuchisake

kuchisake-onna (口裂け女, "slit mouth woman ") is a malevolent figure appearing in japanese ghost stories, possibly dating back to the edo period. she takes the form of a masked woman who approaches people and asks them if they believe she is pretty.

explanation:

assuming that your periodic table has eighteen columns, you should highlight   the four elements in the third column from the left of the table.

neutral atoms of elements after calcium contain d electrons. the energy of d orbitals of a particular main shell lies between the energy of the s and p orbitals of the next main shell. for example, electrons in the have energy higher than those in the orbital while lower than those of the orbital.

by the aufbau principle, electrons fill orbitals one at a time, starting from those of the lowest energy. the orbital is therefore filled right after orbitals and before orbitals.  

potassium has electron configuration and calcium . the s orbital of a main shell holds a maximum of two electrons. the next element would thus have the electron configuration and satisfy the requirements.

a neutral atom of the element contains three electrons on top of the most recent noble gas element. it should thus be placed in the third column of the periodic table. both scandium and yttrium would satisfy the conditions. an aufbau diagram indicates that the 4f orbital is filled before the 5d. however, it appears that exceptions exists for both lanthanum and actinium. neutral atoms of the two d-block elements also demonstrate the and should be highlighted as well.